After several years of apprenticeship at the local level (Krakow) air pollution problem has become nationwide issue, affecting Warsaw, Wrocław, small and big cities. Masks (these provisional, these professional) have increasingly raised popularity in 2017 (which is seen on streets).
Smog is not only active in cities that are located in the valleys but also in Trojmiasto, by the sea. Seems that activities at the local level are insufficient. Will growing problem force national level to action?